1801672168 has 16 divisors (see below), whose sum is σ = 3395286180. Its totient is φ = 896262528.

The previous prime is 1801672157. The next prime is 1801672181. The reversal of 1801672168 is 8612761081.

It can be written as a sum of positive squares in 2 ways, for example, as 1770558084 + 31114084 = 42078^2 + 5578^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1801672168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570021 + ... + 573172.

Almost surely, 2^1801672168 is an apocalyptic number.

It is an amenable number.

1801672168 is a deficient number, since it is larger than the sum of its proper divisors (1593614012).

1801672168 is a wasteful number, since it uses less digits than its factorization.

1801672168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143396 (or 1143392 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1801672168 is about 42446.1089853946. The cubic root of 1801672168 is about 1216.8169663657.

The spelling of 1801672168 in words is "one billion, eight hundred one million, six hundred seventy-two thousand, one hundred sixty-eight".